83xx: Replace CONFIG_MPC83XX with CONFIG_MPC83xx

Use the standard lowercase "xx" capitalization that other Freescale
architectures use for CPU defines to prevent confusion and errors

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
diff --git a/board/sbc8349/sbc8349.c b/board/sbc8349/sbc8349.c
index e01cb03..34861d4 100644
--- a/board/sbc8349/sbc8349.c
+++ b/board/sbc8349/sbc8349.c
@@ -39,7 +39,7 @@
 int fixed_sdram(void);
 void sdram_init(void);
 
-#if defined(CONFIG_DDR_ECC) && defined(CONFIG_MPC83XX)
+#if defined(CONFIG_DDR_ECC) && defined(CONFIG_MPC83xx)
 void ddr_enable_ecc(unsigned int dram_size);
 #endif